/* SPDX-License-Identifier: (GPL-2.0+ OR BSD-3-Clause) */
/*
 * Copyright 2013-2016 Freescale Semiconductor, Inc.
 * Copyright 2016-2017 NXP
 */

#ifndef __SG_SW_QM_H
#define __SG_SW_QM_H

#include <linux/fsl_qman.h>
#include "regs.h"

static inline void cpu_to_hw_sg(struct qm_sg_entry *qm_sg_ptr)
{
	dma_addr_t addr = qm_sg_ptr->opaque;

	qm_sg_ptr->opaque = cpu_to_caam64(addr);
	qm_sg_ptr->sgt_efl = cpu_to_caam32(qm_sg_ptr->sgt_efl);
}

static inline void __dma_to_qm_sg(struct qm_sg_entry *qm_sg_ptr, dma_addr_t dma,
				  u32 len, u16 offset)
{
	qm_sg_ptr->addr = dma;
	qm_sg_ptr->length = len;
	qm_sg_ptr->__reserved2 = 0;
	qm_sg_ptr->bpid = 0;
	qm_sg_ptr->__reserved3 = 0;
	qm_sg_ptr->offset = offset & QM_SG_OFFSET_MASK;

	cpu_to_hw_sg(qm_sg_ptr);
}

static inline void dma_to_qm_sg_one(struct qm_sg_entry *qm_sg_ptr,
				    dma_addr_t dma, u32 len, u16 offset)
{
	qm_sg_ptr->extension = 0;
	qm_sg_ptr->final = 0;
	__dma_to_qm_sg(qm_sg_ptr, dma, len, offset);
}

static inline void dma_to_qm_sg_one_last(struct qm_sg_entry *qm_sg_ptr,
					 dma_addr_t dma, u32 len, u16 offset)
{
	qm_sg_ptr->extension = 0;
	qm_sg_ptr->final = 1;
	__dma_to_qm_sg(qm_sg_ptr, dma, len, offset);
}

static inline void dma_to_qm_sg_one_ext(struct qm_sg_entry *qm_sg_ptr,
					dma_addr_t dma, u32 len, u16 offset)
{
	qm_sg_ptr->extension = 1;
	qm_sg_ptr->final = 0;
	__dma_to_qm_sg(qm_sg_ptr, dma, len, offset);
}

static inline void dma_to_qm_sg_one_last_ext(struct qm_sg_entry *qm_sg_ptr,
					     dma_addr_t dma, u32 len,
					     u16 offset)
{
	qm_sg_ptr->extension = 1;
	qm_sg_ptr->final = 1;
	__dma_to_qm_sg(qm_sg_ptr, dma, len, offset);
}

/*
 * convert scatterlist to h/w link table format
 * but does not have final bit; instead, returns last entry
 */
static inline struct qm_sg_entry *
sg_to_qm_sg(struct scatterlist *sg, int len,
	    struct qm_sg_entry *qm_sg_ptr, u16 offset)
{
	int ent_len;

	while (len) {
		ent_len = min_t(int, sg_dma_len(sg), len);

		dma_to_qm_sg_one(qm_sg_ptr, sg_dma_address(sg), ent_len,
				 offset);
		qm_sg_ptr++;
		sg = sg_next(sg);
		len -= ent_len;
	}
	return qm_sg_ptr - 1;
}

/*
 * convert scatterlist to h/w link table format
 * scatterlist must have been previously dma mapped
 */
static inline void sg_to_qm_sg_last(struct scatterlist *sg, int len,
				    struct qm_sg_entry *qm_sg_ptr, u16 offset)
{
	qm_sg_ptr = sg_to_qm_sg(sg, len, qm_sg_ptr, offset);

	qm_sg_ptr->sgt_efl = caam32_to_cpu(qm_sg_ptr->sgt_efl);
	qm_sg_ptr->final = 1;
	qm_sg_ptr->sgt_efl = cpu_to_caam32(qm_sg_ptr->sgt_efl);
}

#endif /* __SG_SW_QM_H */
